Cc1n[nH]c(N)nc1=O    mol9181    0_1
Cc1n[nH]c([NH3+])nc1=O    mol9181    1_1
Cc1n[nH]c(N)[nH+]c1=O    mol9181    1_2
Cc1[nH+][nH]c(N)nc1=O    mol9181    1_3